$x^2+x^2=72$
$-8w+2w-3w+w-5w+11w$
$a^4-11a^3+24a^2$
$2xy^'+4y=10x^3$
$\lim_{x\to0}\left(\sin\left(x\right)\cos\left(x\right)\right)$
$\sec\left(8x^3+1\right)\csc\left(3x^2\right)$
$\left(25m^2-30mn+9n^2\right)$
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